I have a computer running Catalina (only 64bit software) and a laptop running Hgh Sierra.
I saw that free demo is in both version.
Which Midi Guitar shall I buy, 64 or 32 bit version?
Or the same code is valid for both version?
All mac software these days are 64bit. But its the same license for all of it. You just need to just download the right version for the two macs and apply the same license.